Motor arc-lamp.



F. KIESLER.

MOTOR ARC LAMP.

APPLICATION FILED APR- 17. 1914.

1,205,750. Patented Nov. 21, 1916.

UNITED STATES PATENT 0mm.

FRITZ KIESLER, OF IBERLIN-CHAELOTTENBURG, GERMANY,

ASSIGNOR TO SIEMENS- SCIIUCKERTW'ERKE, Gr. M. B. 3., OF BERLIN, GERMANY, A CORPORATION OF GER- MANY.

MOTOR ARC-LAMP.

Application filed April 17, 1914.

To all whom it may concern Be it known that I, FRITZ KmsLnR, a German citizen, and resident of Berlin- Gharlottenburg, Germany, have invented certain new and useful Improvements in Motor Arc-Lamps, of which the following is a specification.

This invention relates to motor arc lamps and comprises an improved construction for such lamps, whereby the ignition will be essentially facilitated in case scoria has been deposited on the points of the carbon pen oils.

In arc lamps frequently it is found that the carbons are prevented from forming a proper conductive contact, thereby preventing ignition on account of the insulating deposit or layer of scoria on the ends of the carbons.

My present invention is designed to obviate this defect and consists essentially in providing means for setting said carbons in a hammering motion in case ignition should not immediately take place in order to thus break the layer of scoria and to initiate the ignition.

More particularly my invention consists in an especial kind of locking device used ordinarily in motor arc lamps between the driving works and the carrying disk for the movable carbon. This locking device ordinarily serves only to enable the carbon holders to be moved apart for trimming the lamp without setting the driving works in motion.

My invention will be more fully understood by reference to the accompanying drawings, of which- Figure 1 is a crosssection and Fig. 2 a front view of an arc lamp according to my invention. Fig. 3 represents in diagram a motor drive as applied to the arc lamp according to my invention.

In the drawings I have shown a mode of construction for a motor lamp with carbons which are arranged oppositely to each other. The last wheel a is assumed to be so connected with the driving works as to tend to move in counterclockwise direction (Fig. 2) and carries the pawl I) having a well rounded nose and the spring f for the pawl. The locking wheel proper, which couples the rope wheel and chain wheel with the driving mechanism, is of a special form and rigidly connected with the rope wheel Specification of Letters Patent.

Serial No. 832,664.

and chain wheel a. It consists essentially of two parallel disks (Z and (Z between which a circular series of easily rotatable rollers e are mounted which rollers form so to say the locking teeth and which must be of sufficient size to permit pawl f to ride over them when disks (Z (Z are arrested. This locking device may easily be so con vstructed that the force required to cause pawl f to ride over rollers e is smaller than that which can be exerted by the driving works at the normal lamp voltage.

The operation of the aforedescribed apparatus will be as follows: If the arc lamp be switched in, the driving works will be so driven that the last wheel a in Fig. 2 will be rotated in a counter-clockwise sense. The pawl b will then first positively carry the locking wheel with it and move the carbons toward each other until they will contact, whereupon the locking wheel cannot be moved farther. If now an ignition does not immediately take place, the power of the driving works will continue to rotate wheel a in the same direction so that the pawl will slide over a roller of the locking wheel toward the next roller and will thereby give a short impact to the locking wheel for rotation in a clockwise sense each time the pawl passes a roller, whereby the carbons will becaused to hammer upon each other. Immediately or after a few repeated hammering motions the points of the carbons will break through the insulating layer and properly form a conductive contact with each other.

In Fig. 3 the motor drive is represented as comprising the frame 10 upon which is suitably mounted the field structure 11 for rotating an armature disk 12. The armature disk 12 is journaled in brackets such as shown at 18, and its shaft bears a pinion let which meshes with a gear 15, the latter bearing a pinion 16 meshing with a gear a corresponding in all respects with that illustrated in Figs. 1 and 2.

I claim:

In a motor arc lamp the combination of driving works, a supporting disk for the movable carbons, a locking mechanism between said driving works and said supporting disk, rollers mounted upon said locking mechanism for temporarily releasing the connection between driving works and supporting disk which connection is effected by said locking mechanism in case of non-ig- In testimony whereof I have hereunto set nition of the lamp, said locking mechanism my signature in the presence of a subscribcokrlnprising a 1iockilgig pawl and1 a locking ing Witness. W eel, said r0 ers eing adapte to impart r 5 to said locking Wheel an impact for back- ERITA KIESLER' Ward motion, whereby the carbons Will be WVitness: set in motion to hammer upon one another. HENRY HAsPnR.

' Copies of this patent men he obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

